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Stilpnomelane from
Laytonville Quarry, Laytonville, Coastal Range, Mendocino County, California, USA


Locality type:Quarry
Classification
Species:Stilpnomelane
Formula:(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Comments:Individual crystals from a few mm's to about 1 cm.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Glaucophane
Lawsonite
Riebeckite
Associated Minerals Based on Photo Data:
Pyrite1 photo of Stilpnomelane associated with Pyrite at this locality.
Howieite1 photo of Stilpnomelane associated with Howieite at this locality.
Riebeckite1 photo of Stilpnomelane associated with Riebeckite at this locality.
Data
Mineral Data:Click here to view Stilpnomelane data
Locality Data:Click here to view Laytonville Quarry, Laytonville, Coastal Range, Mendocino County, California, USA
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:637038
Long-form Identifier:1:3:637038:1
GUID (UUID V4):4157ba4c-4d62-4433-99d1-7e03dc84bfb8
Nearest other occurrences of Stilpnomelane
0.7km (0.4 miles) Unnamed Howieite-Deerite-Zussmanite occurrence [1], Longvale, Coastal Range, Mendocino County, California, USA
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
found only in ironrich metasediments from Laytonville, California (Agrell et al., 1965). A new occurrence...Punta Nihue north of Valdivia, Chile, in banded stilpnomelane-schists. These are intercalated in the 'Western...zussmanite-stilpnomelane quartz, (2) siderite-quartz+stilpnomelane (3) apatite-stilpnomelane-quartz+siderite...A similar phase was also reported from Laytonville, California (Muir Wood, 1980). The rarity of rock-forming...Agrell et al. (1965) from the Laytonville quarry, Mendocino County, California. At this locality these hydrated
Journal (article/letter/editorial)
45, 1982, PP. 87 99 The Laytonville Quarry (Mendocino County California) exotic block: iron-rich blueschist-facies...Sciences, University of Cambridge ABSTRACT. The Laytonville Quarry exotic block con- panying quartzites have...analysis recalculation, see the Appendix. THE Laytonville Quarry exotic block is the type locality for the...1965). Situated 8 km south of Laytonville (Mendocino County, California), the exotic block, originally...horizons while the accomFIG. 1. Lithology of the Laytonville Quarry exotic * Present address: 20 Emery Street
Journal (issue)
Three Interesting Silicates from the Laytonville Quarry, California Robert J. Lauf Oak Ridge, Tennessee...minerals were discovered at the Laytonville quarry, Mendocino Co., California, Agrell and coworkers took the... Geology of the Laytonville Quarry The Laytonville quarry, Mendocino Co., California, contains metamorphosed...a diverse mineral assemblage that includes stilpnomelane, spessartine, riebeckite, crocidolite, quartz...aragonite (Agrell, Bown, and McKie 1964). The Laytonville quarry exotic block represents a series of deep-ocean
Journal (article/letter/editorial)
at only one locality: the Laytonville Quarry, Mendocino County, California. There are, however, present...similarities are demonstrated within two rocks from the quarry in which a manganese concentration gradient has...leached of potassium. As minnesotaite is more of a range of compositions than a structure (there is mounting...simple talcanalogue) a consideration of the Laytonville manganoan minnesotaite as a zussmanite mineral...very flexible, and capable of fitting with a wide range of octahedral layer sizes. Such problems of compatibility
Journal (article/letter/editorial)
formula of Fe~-Fe3+Si~zO4o(OHho there are a limited range of substitutions: Ti and V for Fe 3§ and Mn on the... Washington State) indicate that its stability range is not quite the same as that o f the normal facies...TABLE I. Deerite localities I. Laytonville Quarry, Mendocino County, California: Agrell et al. (1965). z....Sonoma Co., California: Coleman and Lee (i963). 3. Panoche Pass, San Benito Co., California: Ernst (1965)...Pacheco Pass, California: Ernst et al. (197o). 5. Burn's Flats, Mendocino Co., California: Agrell (unpuhl
Report (issue)
9.564(9) X-ray Powder Pattern: Laytonville district, California, USA. (ICDD 19-421). 9.03 (100), 3.01...46] [96.36] 100.00 4.19 (1) Laytonville district, California, USA. (2) Do.; by electron microprobe...temperature. Association: Howieite, zussmanite, stilpnomelane, spessartine, riebeckite, quartz, aegirine,...kutnohorite (Laytonville district, California, USA). Distribution: In the USA, in California, in the Laytonville...Laytonville quarry, at Covelo, and at Burn's Flats, Mendocino Co.; at Ward Creek, Cazadero, Sonoma Co.;
Journal (article/letter/editorial)
Cambridge SUMMARY. The mineral howieite has a stability range that extends down to pressures at, or even below...discovered by Agrell at the Laytonville Quarry, Mendocino County, California, and named as such in Agrell...o w i e i t e localities I. Laytonville Quarry, Mendocino Co., California (Agrell et al., I965) 2. Ward...Sonoma Co., California (Coleman and Lee, i966; unpubl.) 3. Panoche Pass, San Benito Co., California (Muir Wood...and Merced Cos., California (Muir Wood, 1977) 5- Covelo, Mendocino Co., California (Muir Wood, I977)
Report (issue)
c = 9.589(4) X-ray Powder Pattern: Laytonville, California, USA. (ICDD 19-571). 9.18 (100), 7.91 (80)...(40), 3.06 (35) Chemistry: (1) Laytonville district, California, USA; analysis not given, stated 3+ to...Formation (Laytonville district, California, USA). Association: Deerite, zussmanite, stilpnomelane, spessartine...kutnohorite (Laytonville district, California, USA). Distribution: In the USA, in California, from the Laytonville...Laytonville quarry, and at Covelo, Mendocino Co.; at Ward Creek, Sonoma Co.; in Panoche Pass, San Benito
Journal (article/letter/editorial)
- H 2 0 - C O 2 and the stability limit of stilpnomelane in m e t a m o r p h o s e d P r e e a m b r...University of New Mexico, Albuquerque, NM 87131, USA Abstract. The phase relations of A1- and Fe-bearing...meta-ironstone from the Franciscan Formation, California. These relations allow an estimation of the physiochemical...minerals place the upper stability limit of stilpnomelane in iron-formations at about 430-470~ C and 5...5 6 kilobars. Fe-end member stilpnomelane can persist to a maximum temperature of 500 ~ C and pressures
Report (issue)
69(2) Z=3 X-ray Powder Pattern: Laytonville district, California, USA. (ICDD 19-1500). 9.60 (100), 4.78...metamorphism. Association: Deerite, howieite, stilpnomelane, spessartine, riebeckite, quartz, aegirine,...graphite. Distribution: In the Laytonville quarry, Mendocino Co., California, USA. Name: For Jack Zussman...National Museum of Natural History, Washington, D.C., USA, 109454; The Natural History Museum, London, England...from the Franciscan of the Laytonville District, Mendocino Co., California. MSA meeting, Bozeman, Montana
Journal (article/letter/editorial)
normal sodic amphiboleforming reactions from stilpnomelane and chlorite (in the presence of iron oxides...this paper were collected from localities in California, Oregon, Washington State, the Alps, and Greece...authors' works: Laytonvitle Quarry exotic block, Mendocino Co., California--Chesterman (i966); Ward Creek...Creek, Cazadero, Sonoma Co., California--Coleman and Lee 0963); Panoche Pass, San Benito Co., Calif o...Creek (South Fork), Santa Clara Co., California and Powers Quarry, Coos Co., Oregon--Muir Wood (I977);
Journal (article/letter/editorial)
arrival. CALIFORNIA—In the January 1966 Mineral Information Service, p. 7, published by California Division...zussmanite. These were discovered at a locality near Laytonville, Calif., and were named and first described by...in a quarry on the east side of Highway 101 in Mendocino County, 5.4 miles south of Laytonville or 4...radiating clusters of bladed, black crystals that range up to about half an inch in length. When rubbed...or grains disseminated in quartz and stilpnomelane. At the quarry all three of these minerals occur in
Journal (article/letter/editorial)
the blueschists of the Franciscan Formation, California, USA. Although only recently identified as a new...presently known Locality 1. Laytonville Quarry, Mendocino, County, California, USA Geological environment...Scoon's analysis of No. 93727 2. Panoche Pass, California, USA Metacherts in glaucophane schists of the Franciscan...Franciscan formation Deerite, stilpnomelane, riebeckite, quartz, aegirine, + garnet, aragonite (partly...LuisPacheco Pass, California, USA as in 2. Deerite (rare accessory), quartz, stilpnomelane, _+crossite,
Journal (article/letter/editorial)
Mélanges of the Franciscan Complex, Diablo Range and Northern California: An Analysis and Review Loren A. Raymond...Cotati Ave, Rohnert Park, CA 94928, USA; raymondla@bellsouth.net Coast Range Geological Mapping Institute,... 3327 Cypress Way, Santa Rosa, CA 95405, USA Received: 5 July 2019; Accepted: 22 July 2019; Published:... Abstract: The Franciscan Complex of California is characterized in part by the presence of mélanges...Complex 1. Introduction The Franciscan Complex of California and southwestern Oregon (Figure 1) is widely
Report (issue)
K(Fe2+; Mg; Fe 3+)8 (Si; Al)12 (O; OH)27 Stilpnomelane ° c 2001 Mineral Data Publishing, ver sion 1...Powder Pattern: Crystal Falls, Iron Co., Michigan, USA. 12.3 (100), 4.16 (100), 2.55 (100), 2.69 (70), 3...Mullion Island, The Lizrd, Cornwall, England. In the USA, at the Sterling mine, Antwerp, Je®erson Co., New...Jersey; in the Laytonville quarry, Mendocino Co., and a number of other places in California; at Bald Knob...S.W. Bailey (1965) The crystal structure of stilpnomelane. Part I. The sub cell. Clays and Clay Minerals
Journal (article/letter/editorial)
manganosite, sonolite, magnussonite, I33 Grythytte, stilpnomelane, 36I and M37 Klapperud, Dalecarlia, opsimose...epidote, hornblende, diopsite, 427 Cheesewring quarry, Linkinhorne, danburite, 171; durangite, I72 Chycornish...Crowns Rock, St. Just, Land's End, garnet, 427 Dean quarry, The Lizard, djurle'ite, I72; analcime, adularia...penwithite (= neotocite), 279 and M26 Devon Meldon quarry, Okehampton, greenovite, 172; priceite, 175 Ramsley...Cannington Park quarry, djurlei'te, I72 Combe Farm quarry, Henbury, wulfenite, 298 Merehead quarry, Shepton
Catalog/List
A.JOITE CRYSTALS New Cornelia mine, Ajo, Pima County, Arizona. Hydrated copper aluminum silicate. New...CHALCOPYRITE CRYSTALS on SPHALERITE XLS ° Treece. Cherokee County, Kansas. Bright brassyellow metallic sphenoidal...groups. COPIAPITE CosO Hot Springs, Inyo Co., California A basic hydrated sulfate of ferric and ferrous...Traverse Creek, near Georgetown, El Dorado Co. , California. A basic calcium aluminum silicate. This is a...AZURITE Crystals Piedmont Mine, Bloody Basin, Yavapai County, Arizona. Hydrated copper silicate. Sharp greenish/blue
Journal (issue)
batch of pieces we brought back from the Ritter Quarry that had nice thomsonite and mesolite, so that...Wallowa Co., Oregon Fig. 2. Vesuvianite Mono Co., California 5 corresponding mineral is hedenbergite, CaFeSi2O6...crystals from the Morris Claim, Benton Range, Mono Co., California illustrated in fig. 2. The prisms are...Riverside Co., Bruce Canyon, Lemhi Co., Idaho California known collectively as Crestmore. This is a magnesium...4. Pyrrhotite Geikielite Jensen Quarry, Riverside Co., California Spinel 6 Fig. 5. Titanite and
Journal (article/letter/editorial)
assemblages, collected from the Laytonville Quarry, Mendocino County, California, it was found that the complexity...facies has now become generally accepted to cover a range of rocks that have suffered metamorphism under high...origin of certain blueschist mineralogies. In California the coincidence of these two rock types is common...stability. The second reaction, the absolute stability range of jadeite, is thus more reliable, but http://journals...(Brown, 1974). Glaucophane extends its stability range to higher temperatures than lawsonite where it may
Catalog/List
grey-white crystals on 2x3.5 inch surface. (Croft Quarry,Leicestershire) £5 ANATASE sharp black single crystal...limonite in between from Tynagh mine, near Loughrea. County Gahvay Ireland 4x4x2 £25 CERUSSITE good small thumbnail...Arizona, USA) £5 CERUSSITE pure intergrown columnar mass lx2xl . (Flux Mine,Pima County, Arizona USA) £6 CHROME...feldspar. (Globe Mine.Petaca District, Rio Arriba County, new Mexico) £15 b) smaller crystal section 1 x...top, light brown fibrous on the edges. (Merehead Quarry, Mendips) 2x2.5 £4 HELVITE quite rich light brown
Journal (article/letter/editorial)
cherts from Andros (Cyclades, Greece) and Laytonville (California, USA). While the metasediments contain significant...Sample Lay-3 is from the quarry in Laytonville (CA, USA, 5 miles south of Laytonville, 3955¢0¢¢N, 12327¢3¢¢W)...quartz, pumpellyite, minnesotaite, glaucophane, stilpnomelane, phengite, albite and garnet. The Franciscan... The mineral assemblage (e.g. zussmanite–Laytonville quarry is the only type location) indicates P–T...corresponding to a similar subduction depth as for the Laytonville rocks (ca. 30 km). Analytical procedure The
Journal (article/letter/editorial)
vv. 6 9 3 - 7 t I The crystal structure of stilpnomelane. Part II. The full cell R. A. E G G L E T O...Australia SUMMARY, The structural formula of stilpnomelane averaged from 37 representative literature analyses...published, a d d i t i o n a l analysed samples o f stilpnomelane have generously been m a d e available to the...d discussion to the p r o b l e m s o f the stilpnomelane group. This p a p e r reports the d e t e r...the structure. T h e ideal structure o f the stilpnomelane t e t r a h e d r a l sheet has been briefly
Journal (article/letter/editorial)
Departmentol Geologyand Geophysics,Uniuersity ol California at Berkeley Abshact Howieite, one of the new...chistsof the Franciscanformation in Northern California (Agrell et al, 1965). The crystal usedin the...collectedat the type locality at Laytonville quarry (Mendocino County,California); it is a cleavagefragmentfrom...1a. Plumose aggregateof howieite crystals in stilpnomelane-riebeckiteschist. b. Prismatic bladed crvstal...than this for high angle reflections). The actual range of integrated transmission factors is smaller than
Journal (article/letter/editorial)
respectively. Hw is closely associated with Mn rich stilpnomelane (Mn stp), riebeckite, lawsonite, aegirine, calcite...cherts and meta ironstones in Yugoslavia and California, respectively. In Japan, taneyamalite (Tn), a...91.22°, β = 70.76°, and γ = 108.1°). Mn rich stilpnomelane has a heterogeneous composition, even within... assuming all iron as FeO, shows a composition range of (K0.18–0.54Na0.06–0.15 Ba 0.06–0.12Ca 0.04–0...and Minakawa and Matsuda (2002) also contain stilpnomelane, but no chlorite or white mica. These facts
Journal (article/letter/editorial)
studies of the Franciscan formation, Coast Ranges, California* MORDECKAIMAGARITZand HUGH P. TAYLOR,JR. Division...Cahfornia Institute of Technology. Pasadena. California 91115. U S.A. (Recrrord 14 Aprd 1975; ucceptcd...rocks. The range of 6D values of Franciscantype rocks is identical to the -50 to -80 range shown by most...ophiolite sequence. Sur area Fig. 1. Map of California showing locations of sampled areas in the Franciscan...west-central California from latitude 35”N to 41”N (Fig. 1). The wide latitudinal range of samples is
 
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